Smoke cleaner for furnaces



Oct. 3, 1933- A. c. BENNETT SMOKE CLEANER FOR FURNACES Filed July 24, 1950 Invenl'or", Kshleq C. Bennett. E A-M fl'tcornet s.

Patented Oct. 3, 1933 uui'raojsTATes"; ori ice g 1,928,808 I SMQKECLEANER FOR FURNACES Ashley Bennett, Minneapolis, Minn. Application July 24, 1930. ::S erial N6. 47 Y '2 'Claims, (or. 183-95 My invention relates to smoke cleaners and more particularly to means for cleaning-particles of solid matter from smoke and furnace gases discharged from chimneys, and has for its ob- -ject to remove from furnace gases or smoke all particles of solid matter of appreciable weight before said gases leave the chimney.

A very inexpensive and satisfactory fuel for ,7 making steam for various purposes including the heating of buildings is what is known as powdered co This has advantages both in the matter of economy, since it can use coal which otherwise could not be used for fuel, and also it an effective steam-making agent producing a very hot and well-distributed flame. In practice in the burning of powdered coal it is blown into the fire chamber under forced draft, which, together with the natural draft up tall smoke stacks commonly referred to as chimneys produces a very strong movement of the air up the shaft of the smoke chimney. Powdered coal as produced contains a certain percentage of material which does not burn. This is caught in the strong draft and carried up and out of the smoke chim- .thrown out of it by the action of centrifugal force and gravity, with the result that such particles may be accumulated and carried to a bin and the combustion gases will go. out of the chimney free from all solid particles excepting .those very fine carbon and mineral particles which make light smoke content.

In practice I may locate the device for whirl-, ing and reversing direction of the air either outside or insidethe smoke chimney, and either at a point near the furnace or at a point near the top of the smoke chimney, depending upon the character of the furnace employed and of the building where or near where the smoke chimney is located and the heating devices employed.

The full objects and advantages of my invention will appear in connection with the detailed description thereof, and the novel features of my inventive idea will be particularly pointed out in the claims. a

In the accompanying drawing which illustrates one of the forms in "which myinvention may be embodied,

Fig. '1 is an elevational sectional view of one form of the invention. Fig. 2 is a view in horizontal'section'on the line 2-2.of Fig. 1. Fig. 3 is a view in horizontal section on the line 3-3 of Fig. 1.

Referring to the drawing, the device is shown applied to a smoke chimney 12 through the upper end of which bolts 14 and 16 pass for securing in place a thimble 18 from whose upper end a circumferential flange 20 extends outwardly so as to form the lower member of a casing having a chamber 22 in its lower portion. From the chamber 22, a plurality of tubes 24 extend up to a chamber 26, these tubes being held in place by the upper wall 28 of the chamber 22 and the lower wall 30 of the chamber 26. The upper wall 32 of the chamber 26 is cut out centrally to provide for the passage of a conduit 34 which extends up from the wall member 30 so that the chamber 26 is in the form of an annular chamber into which the upper ends of the tubes 24 lead. The upper portions of the tubes 24 are surrounded by a band 36 while the lower portions of these tubes are surrounded by a band 38. A cylindrical casing member 40 extends up from the flange 20 to the wall member 32 whereby an annular chamber 42 is produced which between the bands 36 and 38 opens between the tubes 24 into the space surrounded by these bands and up through the conduit 34. The annular member 30 constitutes a partition which around its periphery is provided with a multiplicity of slits 44 formed by striking the ma- 90 terial downwardly to produce downwardly inclined deflectors 45. From the periphery of the wall member 28, a number of tubular members or stacks 46 shown as four in number and equally spaced from each other extend downwardly into receiving bins 48. These bins have airtight doors 50 while the stacks 46 are provided with dampers 52. The upper portions of the stacks 46 are held by braces 54. The operation of this form of device will now be understood. The smoke and furnace gases pass up'the chimney 12 into the chamber 22 from which they pass through the tubes 24 into the chamber 26. From this latter chamber, they pass downwardly through the slits 44 so that they are not only reversed in direction but are caused to have a whirling motion by the inclined deflectors 46. As the smoke is whirled or rotated in the annular chamber 42, solid particles carried by the smoke are thrown outwardly by centrifugal action and droppedby gravity into the stacks 46. The smoke from the annular chamber 42 passes through theflspaces between the tubes 24 and upwardly out of the conduit 34 into the outer air. The solid particles fall into the receiving bins 48 from which they may be removed from time to time upon opening the airtight doors. The dampers 52 are-closed before opening these doors in-o'rder gto prevent an updraft through the stacks-48. After the solid. material has-been removed from the bins, the doors are closed and the dampers opened. It will be noted that the chamber 42 constitutes a settling chamber having a dead air space at its bottom.

I claim:

from smoke and furnace gases discharged from smoke stacks, comprising a casing, a lowerhorizontal partition in said casing forminga lower chamber therein,. said chamber having an inlet opening, an upper :horizontal .partition spaecd above said lower partition in 'said icasing and forming an upper chamber thenin,impluralityiof tubes connecting'said chamtnrs,1aaid upper partition' being :provided '-.with a multiplic1ty'=of-;pe-

1,928,808 r .4 H ripheral slits and associated inclined deflectors,

an upwardly extending conduit leading centrally from the space between said partitions, and downwardly extending tubular members leading from the periphery of said space.

2. Means for cleaning particles of solid matter from smoke and furnace gases discharged from smoke stacks, comprising a casing, a lower horizontahpartition said casing forming a lower chamber ithenein, said chamber having an inlet opening, an upper horizontal partition spaced above said lower partition in said casing and =10rming an upper chamber therein, a plurality of tubes connecting said chambers, said upper I "partitionbeingprovided with a multiplicity of pe- 1. Means for cleaning particlesmf'solid matter ripheral slits and associated inclined deflectors, an upwardly extending conduit leading centrally from the-space between said partitions, downwardly extending tubular members leading from the periphery of said space, bins into which saiddownwardly extending tubular members discharge airtightdoors forsaid-bins, and dampers in said tubular members.

ASHLEY c. BENNETT. 

